2021-03-25

debian liunx 环境 mysql8的安装

1.下在mysql安装包

2.上传 mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz 到liunx 系统  /opt/目录下 用 tar -xvf  mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz 命令解压

3.把 解压好的文件移动到  /usr/local/  目录下   mv mysql-8.0.20-linux-glibc2.12-x86_64  /usr/local/mysql/

4.创建用户和用户组  groupadd mysql  useradd -r -g  mysql mysql

5.进入/usr/local/mysql 目录 chown -R mysql:mysql ./

6.创建data文件夹 mkdirs data

7.初始化数据库，并会自动生成随机密码，记下等下登陆要用

# bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data

8.修改/usr/local/mysql当前目录得用户

# chown -R root:root ./
# chown -R mysql:mysql data

9. cp support-files/my-default.cnf /etc/my.cnf  复制过去，其实也就是空白页，一开始没有my-default.cnf这个文件，可以用# touch my-default.cnf命令创建一个，并配置权限 

# cd support-files/
# touch my-default.cnf
# chmod 777 ./my-default.cnf 
# cd ../
# cp support-files/my-default.cnf /etc/my.cnf 

10.配置my.cnf     vim /etc/my.cnf 

[mysqld]
 
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
 
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
 
# These are commonly set, remove the # and set as required.
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
socket = /tmp/mysql.sock
log-error = /usr/local/mysql/data/error.log
pid-file = /usr/local/mysql/data/mysql.pid
tmpdir = /tmp
port = 5186
#lower_case_table_names = 1
# server_id = .....
# socket = .....
#lower_case_table_names = 1
max_allowed_packet=32M
default-authentication-plugin = mysql_native_password
#lower_case_file_system = on
#lower_case_table_names = 1
log_bin_trust_function_creators = ON
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M 
 
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

11. 开机自启，进入/usr/local/mysql/support-files进行设置

# cd support-files/
# cp mysql.server /etc/init.d/mysql 
# chmod +x /etc/init.d/mysql

12. 注册服务  sysv-rc-conf mysql on   查看服务名 sysv-rc-conf --list 

13.etc/ld.so.conf要配置路径，不然报错

# vim /etc/ld.so.conf
 
添加如下内容:
/usr/local/mysql/lib

14.配置环境变量

# vim /etc/profile
# source /etc/profile
 
添加如下内容：
#MYSQL ENVIRONMENT
export PATH=$PATH:/usr/local/mysql/bin:/usr/local/mysql/lib

15.开启Navicat远程连接

# mysql -uroot -p #进入数据库
> use mysql;#进入数据库
> select host, user, authentication_string, plugin from user;#查看用户信息
> GRANT ALL ON *.* TO 'root'@'%';#授权root用户可以远程登陆
> flush privileges;#立即生效
> ALTER USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY 'Kuaigui2019!';#修改root用户密码
> FLUSH PRIVILEGES;#立即生效
> exit;#退出
# service mysql restart#重启mysql服务